/// <summary>
/// Collect information about material layer.
/// For IFC4RV Architectural exchange, it will generate IfcMatrialConstituentSet along with the relevant IfcShapeAspect and the width in the quantityset
/// For IFC4RV Structural exchange, it will generate multiple components as IfcBuildingElementPart for each layer
/// For others IfcMaterialLayer will be created
/// </summary>
private void CollectMaterialLayerSet()
{
ElementId typeElemId = m_Element.GetTypeId();
IFCAnyHandle materialLayerSet = ExporterCacheManager.MaterialSetCache.FindLayerSet(typeElemId);
// Roofs with no components are only allowed one material. We will arbitrarily choose the thickest material.
m_PrimaryMaterialHandle = ExporterCacheManager.MaterialSetCache.FindPrimaryMaterialHnd(typeElemId);
bool materialHandleIsNotValid = !IFCAnyHandleUtil.IsValidHandle(materialLayerSet);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(materialLayerSet) || materialHandleIsNotValid)
{
if (materialHandleIsNotValid)
{
UnregisterIFCHandles();
}
m_needToGenerateIFCObjects = true;
List <double> widths = new List <double>();
List <MaterialFunctionAssignment> functions = new List <MaterialFunctionAssignment>();
HostObjAttributes hostObjAttr = m_Element.Document.GetElement(typeElemId) as HostObjAttributes;
if (hostObjAttr == null)
{
// It does not have the HostObjAttribute (where we will get the compound structure for material layer set.
// We will define a single material instead and create the material layer set of this single material if there is enough information (At least Material id and thickness)
FamilyInstance familyInstance = m_Element as FamilyInstance;
if (familyInstance == null)
{
return;
}
FamilySymbol familySymbol = familyInstance.Symbol;
ICollection <ElementId> famMatIds = familySymbol.GetMaterialIds(false);
if (famMatIds.Count == 0)
{
// For some reason Plate type may not return any Material id
ElementId baseMatId = CategoryUtil.GetBaseMaterialIdForElement(m_Element);
Material material = m_Element.Document.GetElement(baseMatId) as Material;
if (material == null)
{
return;
}
string layerName = NamingUtil.GetMaterialLayerName(material);
double matWidth = 0.0;
Parameter thicknessPar = familySymbol.get_Parameter(BuiltInParameter.CURTAIN_WALL_SYSPANEL_THICKNESS);
if (thicknessPar != null)
{
matWidth = thicknessPar.AsDouble();
}
widths.Add(matWidth);
if (baseMatId != ElementId.InvalidElementId)
{
MaterialIds.Add(new MaterialInfo(baseMatId, layerName, matWidth, MaterialFunctionAssignment.None));
}
// How to get the thickness? For CurtainWall Panel (PanelType), there is a builtin parameter CURTAINWALL_SYSPANEL_THICKNESS
functions.Add(MaterialFunctionAssignment.None);
}
else
{
foreach (ElementId matid in famMatIds)
{
// How to get the thickness? For CurtainWall Panel (PanelType), there is a builtin parameter CURTAINWALL_SYSPANEL_THICKNESS
Parameter thicknessPar = familySymbol.get_Parameter(BuiltInParameter.CURTAIN_WALL_SYSPANEL_THICKNESS);
double matWidth = 0.0;
if (thicknessPar == null)
{
matWidth = ParameterUtil.GetSpecialThicknessParameter(familySymbol);
}
else
{
matWidth = thicknessPar.AsDouble();
}
if (MathUtil.IsAlmostZero(matWidth))
{
continue;
}
widths.Add(matWidth);
ElementId baseMatId = CategoryUtil.GetBaseMaterialIdForElement(m_Element);
if (matid != ElementId.InvalidElementId)
{
Material material = m_Element.Document.GetElement(matid) as Material;
if (material != null)
{
string layerName = NamingUtil.GetMaterialLayerName(material);
MaterialIds.Add(new MaterialInfo(matid, layerName, matWidth, MaterialFunctionAssignment.None));
}
}
else
{
MaterialIds.Add(new MaterialInfo(baseMatId, null, matWidth, MaterialFunctionAssignment.None));
}
functions.Add(MaterialFunctionAssignment.None);
}
}
}
else
{
ElementId baseMatId = CategoryUtil.GetBaseMaterialIdForElement(m_Element);
CompoundStructure cs = hostObjAttr.GetCompoundStructure();
if (cs != null)
{
double scaledOffset = 0.0, scaledWallWidth = 0.0, wallHeight = 0.0;
Wall wall = m_Element as Wall;
if (wall != null)
{
scaledWallWidth = UnitUtil.ScaleLength(wall.Width);
scaledOffset = -scaledWallWidth / 2.0;
BoundingBoxXYZ boundingBox = wall.get_BoundingBox(null);
if (boundingBox != null)
{
wallHeight = boundingBox.Max.Z - boundingBox.Min.Z;
}
}
//TODO: Vertically compound structures are not yet supported by export.
if (!cs.IsVerticallyHomogeneous() && !MathUtil.IsAlmostZero(wallHeight))
{
cs = cs.GetSimpleCompoundStructure(wallHeight, wallHeight / 2.0);
}
for (int ii = 0; ii < cs.LayerCount; ++ii)
{
double matWidth = cs.GetLayerWidth(ii);
//if (MathUtil.IsAlmostZero(matWidth))
// continue;
ElementId matId = cs.GetMaterialId(ii);
widths.Add(matWidth);
// save layer function into ProductWrapper,
// it's used while exporting "Function" of Pset_CoveringCommon
functions.Add(cs.GetLayerFunction(ii));
if (matId != ElementId.InvalidElementId)
{
Material material = m_Element.Document.GetElement(matId) as Material;
if (material != null)
{
string layerName = NamingUtil.GetMaterialLayerName(material);
MaterialIds.Add(new MaterialInfo(matId, layerName, matWidth, functions.Last()));
}
}
else
{
MaterialIds.Add(new MaterialInfo(baseMatId, null, matWidth, functions.Last()));
}
}
}
if (MaterialIds.Count == 0)
{
double matWidth = cs != null?cs.GetWidth() : 0.0;
widths.Add(matWidth);
if (baseMatId != ElementId.InvalidElementId)
{
Material material = m_Element.Document.GetElement(baseMatId) as Material;
if (material != null)
{
string layerName = NamingUtil.GetMaterialLayerName(material);
MaterialIds.Add(new MaterialInfo(baseMatId, layerName, matWidth, MaterialFunctionAssignment.None));
}
}
functions.Add(MaterialFunctionAssignment.None);
}
}
}
else
{
m_needToGenerateIFCObjects = false;
m_MaterialLayerSetHandle = materialLayerSet;
MaterialLayerSetInfo mlsInfo = ExporterCacheManager.MaterialSetCache.FindMaterialLayerSetInfo(typeElemId);
if (mlsInfo != null)
{
MaterialIds = mlsInfo.MaterialIds;
m_PrimaryMaterialHandle = mlsInfo.PrimaryMaterialHandle;
m_LayerQuantityWidthHnd = mlsInfo.LayerQuantityWidthHnd;
}
}
return;
}
private void Stream(ArrayList data, HostObjAttributes hostAtt)
{
data.Add(new Snoop.Data.ClassSeparator(typeof(HostObjAttributes)));
data.Add(new Snoop.Data.Object("Compound Structure", hostAtt.GetCompoundStructure()));
ContFootingType contFootingType = hostAtt as ContFootingType;
if (contFootingType != null)
{
Stream(data, contFootingType);
return;
}
CurtainSystemType curSysType = hostAtt as CurtainSystemType;
if (curSysType != null)
{
Stream(data, curSysType);
return;
}
FloorType floorType = hostAtt as FloorType;
if (floorType != null)
{
Stream(data, floorType);
return;
}
HostedSweepType hostSweepType = hostAtt as HostedSweepType;
if (hostSweepType != null)
{
Stream(data, hostSweepType);
return;
}
RoofType roofType = hostAtt as RoofType;
if (roofType != null)
{
Stream(data, roofType);
return;
}
WallType wallType = hostAtt as WallType;
if (wallType != null)
{
Stream(data, wallType);
return;
}
}
/// <summary>
/// Exports materials for host object.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC object.</param>
/// <param name="hostObject">The host object.</param>
/// <param name="elemHnds">The host IFC handles.</param>
/// <param name="geometryElement">The geometry element.</param>
/// <param name="productWrapper">The ProductWrapper.</param>
/// <param name="levelId">The level id.</param>
/// <param name="direction">The IFCLayerSetDirection.</param>
/// <param name="containsBRepGeometry">True if the geometry contains BRep geoemtry. If so, we will export an IfcMaterialList</param>
/// <returns>True if exported successfully, false otherwise.</returns>
public static bool ExportHostObjectMaterials(ExporterIFC exporterIFC, HostObject hostObject,
IList <IFCAnyHandle> elemHnds, GeometryElement geometryElement, ProductWrapper productWrapper,
ElementId levelId, Toolkit.IFCLayerSetDirection direction, bool containsBRepGeometry)
{
if (hostObject == null)
{
return(true); //nothing to do
}
if (elemHnds == null || (elemHnds.Count == 0))
{
return(true); //nothing to do
}
IFCFile file = exporterIFC.GetFile();
using (IFCTransaction tr = new IFCTransaction(file))
{
if (productWrapper != null)
{
productWrapper.ClearFinishMaterials();
}
double scaledOffset = 0.0, scaledWallWidth = 0.0, wallHeight = 0.0;
Wall wall = hostObject as Wall;
if (wall != null)
{
scaledWallWidth = UnitUtil.ScaleLength(wall.Width);
scaledOffset = -scaledWallWidth / 2.0;
BoundingBoxXYZ boundingBox = wall.get_BoundingBox(null);
if (boundingBox != null)
{
wallHeight = boundingBox.Max.Z - boundingBox.Min.Z;
}
}
ElementId typeElemId = hostObject.GetTypeId();
IFCAnyHandle materialLayerSet = ExporterCacheManager.MaterialLayerSetCache.Find(typeElemId);
// Roofs with no components are only allowed one material. We will arbitrarily choose the thickest material.
IFCAnyHandle primaryMaterialHnd = ExporterCacheManager.MaterialLayerSetCache.FindPrimaryMaterialHnd(typeElemId);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(materialLayerSet))
{
HostObjAttributes hostObjAttr = hostObject.Document.GetElement(typeElemId) as HostObjAttributes;
if (hostObjAttr == null)
{
return(true); //nothing to do
}
List <ElementId> matIds = new List <ElementId>();
List <double> widths = new List <double>();
List <MaterialFunctionAssignment> functions = new List <MaterialFunctionAssignment>();
ElementId baseMatId = CategoryUtil.GetBaseMaterialIdForElement(hostObject);
CompoundStructure cs = hostObjAttr.GetCompoundStructure();
if (cs != null)
{
//TODO: Vertically compound structures are not yet supported by export.
if (!cs.IsVerticallyHomogeneous() && !MathUtil.IsAlmostZero(wallHeight))
{
cs = cs.GetSimpleCompoundStructure(wallHeight, wallHeight / 2.0);
}
for (int i = 0; i < cs.LayerCount; ++i)
{
ElementId matId = cs.GetMaterialId(i);
if (matId != ElementId.InvalidElementId)
{
matIds.Add(matId);
}
else
{
matIds.Add(baseMatId);
}
widths.Add(cs.GetLayerWidth(i));
// save layer function into ProductWrapper,
// it's used while exporting "Function" of Pset_CoveringCommon
functions.Add(cs.GetLayerFunction(i));
}
}
if (matIds.Count == 0)
{
matIds.Add(baseMatId);
widths.Add(cs != null ? cs.GetWidth() : 0);
functions.Add(MaterialFunctionAssignment.None);
}
// We can't create IfcMaterialLayers without creating an IfcMaterialLayerSet. So we will simply collate here.
IList <IFCAnyHandle> materialHnds = new List <IFCAnyHandle>();
IList <int> widthIndices = new List <int>();
double thickestLayer = 0.0;
for (int ii = 0; ii < matIds.Count; ++ii)
{
// Require positive width for IFC2x3 and before, and non-negative width for IFC4.
if (widths[ii] < -MathUtil.Eps())
{
continue;
}
bool almostZeroWidth = MathUtil.IsAlmostZero(widths[ii]);
if (ExporterCacheManager.ExportOptionsCache.FileVersion != IFCVersion.IFC4 && almostZeroWidth)
{
continue;
}
if (almostZeroWidth)
{
widths[ii] = 0.0;
}
IFCAnyHandle materialHnd = CategoryUtil.GetOrCreateMaterialHandle(exporterIFC, matIds[ii]);
if (primaryMaterialHnd == null || (widths[ii] > thickestLayer))
{
primaryMaterialHnd = materialHnd;
thickestLayer = widths[ii];
}
widthIndices.Add(ii);
materialHnds.Add(materialHnd);
if ((productWrapper != null) && (functions[ii] == MaterialFunctionAssignment.Finish1 || functions[ii] == MaterialFunctionAssignment.Finish2))
{
productWrapper.AddFinishMaterial(materialHnd);
}
}
int numLayersToCreate = widthIndices.Count;
if (numLayersToCreate == 0)
{
return(false);
}
if (!containsBRepGeometry)
{
IList <IFCAnyHandle> layers = new List <IFCAnyHandle>(numLayersToCreate);
for (int ii = 0; ii < numLayersToCreate; ii++)
{
int widthIndex = widthIndices[ii];
double scaledWidth = UnitUtil.ScaleLength(widths[widthIndex]);
IFCAnyHandle materialLayer = IFCInstanceExporter.CreateMaterialLayer(file, materialHnds[ii], scaledWidth, null);
layers.Add(materialLayer);
}
string layerSetName = exporterIFC.GetFamilyName();
materialLayerSet = IFCInstanceExporter.CreateMaterialLayerSet(file, layers, layerSetName);
ExporterCacheManager.MaterialLayerSetCache.Register(typeElemId, materialLayerSet);
ExporterCacheManager.MaterialLayerSetCache.RegisterPrimaryMaterialHnd(typeElemId, primaryMaterialHnd);
}
else
{
foreach (IFCAnyHandle elemHnd in elemHnds)
{
CategoryUtil.CreateMaterialAssociations(exporterIFC, elemHnd, matIds);
}
}
}
// IfcMaterialLayerSetUsage is not supported for IfcWall, only IfcWallStandardCase.
IFCAnyHandle layerSetUsage = null;
for (int ii = 0; ii < elemHnds.Count; ii++)
{
IFCAnyHandle elemHnd = elemHnds[ii];
if (IFCAnyHandleUtil.IsNullOrHasNoValue(elemHnd))
{
continue;
}
SpaceBoundingElementUtil.RegisterSpaceBoundingElementHandle(exporterIFC, elemHnd, hostObject.Id, levelId);
if (containsBRepGeometry)
{
continue;
}
HashSet <IFCAnyHandle> relDecomposesSet = IFCAnyHandleUtil.GetRelDecomposes(elemHnd);
IList <IFCAnyHandle> subElemHnds = null;
if (relDecomposesSet != null && relDecomposesSet.Count == 1)
{
IFCAnyHandle relAggregates = relDecomposesSet.First();
if (IFCAnyHandleUtil.IsTypeOf(relAggregates, IFCEntityType.IfcRelAggregates))
{
subElemHnds = IFCAnyHandleUtil.GetAggregateInstanceAttribute <List <IFCAnyHandle> >(relAggregates, "RelatedObjects");
}
}
bool hasSubElems = (subElemHnds != null && subElemHnds.Count != 0);
bool isRoof = IFCAnyHandleUtil.IsTypeOf(elemHnd, IFCEntityType.IfcRoof);
if (!hasSubElems && !isRoof && !IFCAnyHandleUtil.IsTypeOf(elemHnd, IFCEntityType.IfcWall))
{
if (layerSetUsage == null)
{
bool flipDirSense = true;
if (wall != null)
{
// if we have flipped the center curve on export, we need to take that into account here.
// We flip the center curve on export if it is an arc and it has a negative Z direction.
LocationCurve locCurve = wall.Location as LocationCurve;
if (locCurve != null)
{
Curve curve = locCurve.Curve;
Plane defPlane = new Plane(XYZ.BasisX, XYZ.BasisY, XYZ.Zero);
bool curveFlipped = GeometryUtil.MustFlipCurve(defPlane, curve);
flipDirSense = !(wall.Flipped ^ curveFlipped);
}
}
else if (hostObject is Floor)
{
flipDirSense = false;
}
double offsetFromReferenceLine = flipDirSense ? -scaledOffset : scaledOffset;
IFCDirectionSense sense = flipDirSense ? IFCDirectionSense.Negative : IFCDirectionSense.Positive;
layerSetUsage = IFCInstanceExporter.CreateMaterialLayerSetUsage(file, materialLayerSet, direction, sense, offsetFromReferenceLine);
}
ExporterCacheManager.MaterialLayerRelationsCache.Add(layerSetUsage, elemHnd);
}
else
{
if (hasSubElems)
{
foreach (IFCAnyHandle subElemHnd in subElemHnds)
{
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(subElemHnd))
{
ExporterCacheManager.MaterialLayerRelationsCache.Add(materialLayerSet, subElemHnd);
}
}
}
else if (!isRoof)
{
ExporterCacheManager.MaterialLayerRelationsCache.Add(materialLayerSet, elemHnd);
}
else if (primaryMaterialHnd != null)
{
ExporterCacheManager.MaterialLayerRelationsCache.Add(primaryMaterialHnd, elemHnd);
}
}
}
tr.Commit();
return(true);
}
}